Abstract: A radio frequency (RF) communications system may include a first RF node that transmits redundant data channels on different RF spatial paths and transmits a control channel for synchronization lock with at least one other RF node. A second RF node may receive the redundant data channels on the plurality of respective different RF spatial paths that are subject to RF disruption so that a disrupted redundant data channel loses synchronization lock. The second node may reacquire synchronization lock for the disrupted redundant data channel based upon data within another redundant data channel and in a shorter time than reacquiring synchronization lock using the control channel.

Abstract: Communicating using spread spectrum. A legacy RF signal is intercepted from a legacy radio. Spread spectrum processing is performed on the legacy RF signal to create a spread signal. The spread signal is transmitted to a receiver, whereafter the spread signal is de-spread to recover the legacy RF signal.

Abstract: Communicating using spread spectrum. A legacy RF signal is intercepted from a legacy radio. spread spectrum processing is performed on the legacy RF signal to create a spread signal. The spread signal is transmitted to a receiver, whereafter the spread signal is de-spread to recover the legacy RF signal.

Abstract: Transmitting a signal from a transmitter. A method includes identifying a threshold spectral flux density for a given physical location. The method further includes, as a result of identifying the threshold spectral flux density, transmitting a signal at a power level causing the signal to be below the spectral flux density at the given physical location, the signal being transmitted at a data rate. The method further includes receiving feedback from a receiver indicating the signal-to-noise ratio of the signal at the receiver. The method further includes adjusting the data rate of the signal based on the feedback. The method further includes continuing transmitting the signal at the adjusted data rate and power level.

Abstract: Transmitting a signal from a transmitter. A method includes identifying a threshold spectral flux density for a given physical location. The method further includes, as a result of identifying the threshold spectral flux density, transmitting a signal at a power level causing the signal to be below the spectral flux density at the given physical location, the signal being transmitted at a data rate. The method further includes receiving feedback from a receiver indicating the signal-to-noise ratio of the signal at the receiver. The method further includes adjusting the data rate of the signal based on the feedback. The method further includes continuing transmitting the signal at the adjusted data rate and power level.